Cypripedium passerinum
| Sparrow's-egg lady's-slipper | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Cypripedioideae |
| Genus: | Cypripedium |
| Species: | C. passerinum
|
| Binomial name | |
| Cypripedium passerinum | |
Cypripedium passerinum is a species of lady's slipper orchid known by the common names sparrow's-egg lady's-slipper,[3] spotted lady's-slipper, and Franklin's lady's-slipper.
Description[edit]
This orchid is a rhizomatous monocot, perennial herb growing to a maximum height around 50 centimetres (20 inches). There are 3 to 7 oval or lance-shaped leaves arranged alternately on the stem, each up to 19 centimetres (7.5 inches) long by 6 cm (2.4 in) wide. The herbage is hairy and sticky.[4] The inflorescence at the top of the stem contains one or two flowers. The flower has a dorsal sepal covering the petals and two lateral sepals. There are three petals: two flat white petals on either side and one central petal modified into a white or pink-tinged pouch with purplish spotting at the lip and inside, which is said to resemble a sparrow's egg.[3] The fruit is a capsule. The plant may reproduce by seed but it more often reproduces vegetatively by sending up more stems from the rhizome.[5][6]
Habitat[edit]
This species grows farther north than other Cypripedium.[3] It grows in moist spruce forests at low elevations, tundra, dunes, and river terraces, lakeshores, and streambanks.[5][6] It often grows on calcareous substrates. It is associated with plants such as white spruce (Picea glauca), Engelmann spruce (P. engelmannii), western redcedar (Thuja occidentalis), red-osier dogwood (Cornus sericea), willows (Salix spp.), horsetail (Equisetum spp.), longtube twinflower (Linnaea borealis), sedges (Carex spp.), one-sided pyrola (Orthilia secunda), and moss carpet (Pleurozium schreberi).[5]
Range[edit]
Cypripedium passerinum is native to northern North America. It is widespread in Canada from British Columbia to Quebec, as well as all three northern territories. It also is found Alaska and in the Rocky Mountains of Montana, including inside Glacier National Park.[5][7][8]
Importance to the ecosystem[edit]
Little is known about the importance of C. passerinum to the ecosystem. In some studies, it has been noted that insects (e.g., moths, sawfly, and a leaf miner) have fed on them.[5] Bees have been identified to pollinate other Cypripedium however unlike other Cypripedium, C. passerinum is self pollinating and therefore does not require a pollinator for reproduction.[9] A variety of species grow with the sparrow's-egg lady-slipper, such as Linnaea borealis, Carex concinna, Orthilia secunda, and Pleurozium schreberi.[9]
Conservation[edit]
Cypripedium passerinum is an extremely rare plant in certain areas. Its highly specific habitat requirements contribute to its risk of extinction. In the United States, C. passerinum is only found in two states, Alaska and Montana, and in locations that are threatened by oil and gas exploration.[5] In Canada, it has been found in Wagner Natural Area outside of Edmonton, where efforts are ongoing to use microsatellites for its conservation.[10][11]
References[edit]
- ^ Rankou, H. (2014). "Cypripedium passerinum". IUCN Red List of Threatened Species. 2014: e.T43316819A43327709. doi:10.2305/IUCN.UK.2014-1.RLTS.T43316819A43327709.en. Retrieved 3 January 2023.
- ^ "Cypripedium passerinum. NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 4 January 2023.
- ^ a b c "Cypripedium passerinum". Meet The Ladies: The Slipper Orchids. Celebrating Wildflowers. United States Forest Service (USFS). Retrieved 2011-11-14.
- ^ "Cypripedium passerinum". The Nature Conservancy. Retrieved 2011-11-14.[permanent dead link]
- ^ a b c d e f Williams, Tara Y. (1990). "Cypripedium passerinum". Fire Effects Information System (FEIS). US Department of Agriculture (USDA), Forest Service (USFS), Rocky Mountain Research Station, Fire Sciences Laboratory. Archived from the original on 2011-02-25. Retrieved 2011-11-14.
- ^ a b Sheviak, Charles J. (2002). "Cypripedium passerinum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 26. New York and Oxford: Oxford University Press. Retrieved 2011-11-14 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- ^ USDA, NRCS (n.d.). "Cypripedium passerinum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team.
- ^ "Cypripedium passerinum". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
- ^ a b Keddy, C. J.; Keddy, P. A.; R. J. Planck (1983). "An ecological study of Cypripedium passerninum Rich. (sparrow's egg lady-slipper, Orchidaceae) on the north shore of Lake Superior". Canadian Field-Naturalist. 97 (3): 268–274.
- ^ Brooks, Noah (2021-09-07). "Isolation of Microsatellites from Cypripedium passerinum by FIASCO". Student Research Proceedings. 6 (1).
- ^ Giebelhaus, J. Duncan (2018-06-19). "Integrated Conservation of Native Orchids". Student Research Proceedings. 3 (1).
External links[edit]
Media related to Sparrow's-egg lady's-slipper (Cypripedium passerinum) at Wikimedia Commons
Data related to Sparrow's-egg lady's-slipper (Cypripedium passerinum) at Wikispecies
